Pressure Sensitive Liners
This white plastic screw top cap includes a PS liner inside the cap. In other words, A pressure-sensitive liner is a variety of polystyrene liners. For instance, it is commonly referred to as poly liners. An ideal general-purpose liner material, the compressible Pressure Sensitive foam creates a stable seal. In addition, Pressure-sensitive liners are odor resistant and pulp dust-free. Pressure-sensitive liners are recommended to be used with powders or dry products. Pressure-sensitive liners are not recommended for use with liquid.
Pressure Sensitive liner has an adhesive coated on foam seal and a release coating on the back that does not come in contact with the product. It adheres to either glass, metal, or plastic containers when applied and sticks to the container when the cap is removed. Once the cap is applied, it should not be removed for at least 24 hours to ensure proper adhesion. Pressure-sensitive liners have a recommended shelf life of 6-months.